320654959 has 2 divisors, whose sum is σ = 320654960. Its totient is φ = 320654958.

The previous prime is 320654941. The next prime is 320654989. The reversal of 320654959 is 959456023.

It is a weak prime.

It is an emirp because it is prime and its reverse (959456023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320654959 - 2¹⁵ = 320622191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320654989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160327479 + 160327480.

It is an arithmetic number, because the mean of its divisors is an integer number (160327480).

Almost surely, 2^320654959 is an apocalyptic number.

320654959 is a deficient number, since it is larger than the sum of its proper divisors (1).

320654959 is an equidigital number, since it uses as much as digits as its factorization.

320654959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 43.

The square root of 320654959 is about 17906.8411228781. The cubic root of 320654959 is about 684.4567123829.

The spelling of 320654959 in words is "three hundred twenty million, six hundred fifty-four thousand, nine hundred fifty-nine".